Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d16354d8a52012…

MALICIOUS

PDF

87.4 KB Created: 2021-06-28 02:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2889b92ae59f3550a40d9b34c97c5cbd SHA-1: 357cac690d5334866aea299542d4b9e10180af77 SHA-256: b0d16354d8a520123ce6db8218079e729ac94c72a3bd1fcecd87025a75f23631
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users through deceptive redirection, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072492fe3781---90344305773.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8346b7824728679f102834e92e59a6e4/jizajigu.pdf
    • http://adaviestransportltd.com/userfiles/file/fepademoruzi.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/jrd5q0efkvb0mmfrqq6madcdao/24664680979.pdf
    • https://dynasty888.com/image/files/20210529_033346.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/287e6099b22e5778cbec635dcc0d9e91/tidafadatanaken.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/4a7f50266edbccd1d206725ffbccd716/91397758542.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97884d337---46324971564.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a26e462069---vupowanifojurituv.pdf
    • http://tscyw.net/userfiles/file/20210626041725_8ngelm.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c536404f3---xegalurimelabavi.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a802c59f552---71530605356.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb7282e24d---41973973073.pdf
    • http://navigator-nsk.ru/userfiles/file/64947407487.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/69e6d3dbb4676b52a338f1a45c86d00f/zojuboxunujuxiti.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f70bec6e16fc7950bcb0a300360fe734/kukamarutidolujife.pdf
    • https://mvservice.it/file/rarekuvaxusifadarogabin.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160707427f2cf3---73071386498.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef300a0f88---23237303298.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160799ac42903f---64112321965.pdf
    • http://shuimotongyuan.com/userfiles/file/46008530079.pdf
    • http://bidmitt.com/img/files/file/56051090710.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5c58265696b913036d36cbdc3a197ba6/56733014785.pdf
    • http://mg001.cn/upload_fck/file/2021-6-26/20210626071741754564.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+happens+when+you+miscarry
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 16792 bytes
font_01_sfnt_off00010bbe.bin
078ab604b942f6c5bc7851d88e1c19cbc8e4ad7c0dfd20f6547e053805b42db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 10888 bytes
font_02_sfnt_off000124d3.bin
9792becd6fb1452ee52f89b2362db5239aecf2fb8bab8e21863ac2942439085b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124D3 16640 bytes

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